322 Reviews — Geological Survey of Minnesota. 



Menardi, and Ammonites navicularis occur near the top of the division, 

 showing that these species continued to exist along the shores 

 throughout the Cenomanien stage. The local succession, however, 

 is just as clear as our own, and according to M. Guillier the arenaceous 

 beds pass laterally into the ordinary chalky facies or Normandy type, 

 the parallelism being as follows : — 



6. Marne a Ostrea hiauriculata. \ n ' ^ 7? 7 7 



5. Sables h RhpncI/. co?npressa. j -P • 



4. Sables et gres du Mans passing into Craie de Theligny, \ 



both with Turrilites costatus. { ^ •„ ;i„ x>„„„^ 



o a„-ui ^ r. 7 7 ^ > Craie de Jttouen. 



3. bable a Ferna lanceolata. 1 



2. Craie et argile glauconieuse a Pecten asper. j 



1. Glauconie a Ostrea vesiculosa = Gaize des Ardennes. 



In this he differs from Prof. Hebert, who does not admit the 

 synchronism of the Gres du Maine and the Craie de Kouen. He 

 also differs from the same authority in regarding the Cenomanien as 

 succeeded conformably by the Turonien, which is divisible into three 



zones. 



3. Craie a Terehratella Bourgeoisii. 



2. Craie a Inoceramus prohlematicus {mytiloides). 



1. Craie a Terehratella Carentonensis. 



These are succeeded by Chalk with Spondylus truncatus, which is 

 classed as Senonien. 



At the base of the Eocene are placed certain sands and clays with 

 flints, but English geologists would probably doubt the evidence of 

 stratigraphical succession and the propriety of classing them as 

 Eocene. The true Eocene strata are as follows : — 



4. Clay of La Bosse. 



3. Freshwater Limestone of St. Aubin. 



2. Sands with Sabalites. 



1. Conglomerates. 



The conglomerates and sands are correlated with our Middle 

 Bagshots and the limestone with the upper part of the Calcaire 

 Grossier (Brack! esham). 



A small area of Faluns (Miocene) comes into the Department. 

 Lastly the so-called Quaternary deposits are described, and there are 

 short chapters on Metamorphic and Eruptive Rocks, on Building 

 Stones, and Minei'al Waters, while a Bibliography and Index com- 

 plete the volume. 



We regret to find that the author died before its publication, so 

 that the revision of the latter part was performed by one of his 

 pupils. 



III. — The Geological and Natukal-Histort Survey of Minne- 

 sota. The Thirteenth Annual Report, for 1884, pp. 196 ; the 

 Fourteenth Annual Report, for 1885, pp. 353, Svo. (St. Paul's, 

 1885 and 1886.) 



WITH the exception of some valuable information to farmers 

 and others as to Insects injurious to the Cabbage, by 0. W. 

 Oestlund, some Notes on the Mammals of Big-Stone Lake, by C. L. 

 Herrick, and a paper on Minnesota Geographical Names derived 



